In the oceanographic museum of Monaco watchmaker Hubolt presented model wristwatch King Power Oceanographic 4000 divers with water resistant to 4000 meters. To withstand such extreme depths, chronograph “supplied” exceptionally materials. Thus, the thickness of the sapphire crystal is 6,5 mm. Watches are equipped with an automatic mechanism HUB 1400 housing made of carbon fiber. Diameter is 48 mm.